Made crown prince in 656 while still a small child, he died suddenly in 675 at a palace near
洛阳, in his early twenties. People at the time believed his mother had poisoned him; many historians now think he died of an illness, probably tuberculosis. His father,
唐高宗 (Emperor Gaozong), gave him the title
孝敬皇帝 'Emperor Xiaojing', though he never reigned.
